Silo-scaffold



J. MYERS.

slLo scArroLn. APPLICATION FILED SEPT'29, I9I9.

1,380,074. rammed May 31,1921.

2 SHEETS-SHEET I.

x E f3@ J. MYERS.

SILO SCAFFOLD.V APPucAnoN FILED sEPLzs. 1919.

Patented May 31, 1921.

2 SHEETS-#SHEET 2.

sientas Jouir rfi-vans, or srnntrnc, rLLINoIs.

.artnr SILO-SGAFFOLD.

nesacaa.

To all Awhom t may concern:

Be it lrnown that l, JOHN MYERS, a citizen of the United States, residing at Sterling7 in the county of "Whiteside and State of Illinois, have invented certain new and u seful improvements in Silo-Scaffolds,of which the following is a specification.

YMy invention has reference to silo scaffolds, andhas for its purpose to provide a supporting device which can be progressively raised` as the walls Vof the silo are constructed, which can be readilyfoperated, and

which can be easily takenv apart for transportation from one point to another. The parts thereof are also adjustable, so that it can be used in the construction'of'silos of 'varying diameters. By its use there `is a great saving in expense overlthe VVcommon Vmethod of forming a staging of boards,

which can only -be used in three silos, 'at' best.

In the drawings:

building two or Figure 1 is a vertical medial-section' of my invention, as'the same appears when in use.A Fig.; 2 is a plan view thereof with the superstructure removed. Fig. 3 is anV enlarged detail of the outer end of one of the arms 11. Y

The device is designed to be supported entirely upon a center-pole, formed of tubular sections l of convenient length, having threaded connections at their ends. in the upper end of the upper section is inserted a plug 2, with which are connected staywires 3. Slidable on the center-pole is a sleeve 4, provided near its upper and lower ends with hubs 5 and 6, said sleeve projectring upwardly beyondl the hub 5, the eXtension thereof having two or more set-bolts 7, adapted for engagement with the pole 1. The sleeve 4 also has a downward extension 8, provided with set-bolts 9, also engaging to receive similarly threaded capsf13, provided with openings 14. rlhe rods 12 can be held in place byV means ofV set-bolts 15. Secured to the lower faces of the arms 11, near the outer ends thereof, are clips 16, each provided with a pair of perforated ears Y Specification of Letters Patent. Patented Rigby 31, 1921, "Application iled September 29, 1919. Serial No. 327,146. i

in said platform is an opening v22, to permitv Vthe passage of material, as hereinafter mentionedf In Fig. 2 a part of thevplatform is broken away, to more .clearly disclose the structure by which it is supported.Y

arm23, having a series ofopenings,rinoneof which'is secured a double pulley 24, vcarrying a cable 25, which passes downwardly through a similar pulley 26,.detachablycon nected with the upper end of the sleeve 4.V The arm 23 is braced byan arm.27,support-. ed from a collar 28, also; attached to thel section 1. At the opposite end-ofthev arm Q23 Secured to the upper section l-is a crosssupportedv a pulleyV4 29,'over Lwhich passes Y a cable y-30 by means ofwhichvmaterialmay j be hauled up through-,the opening 22 in the platform. j .f I

,Encircling the center-pole, just above the sleeve 4, isa collar 31, to which is secured a hollow member'32, Aso as tohave a vertical swinging play. rielescopically mounted in the member 32 isa rodn 33, which maybe held in adjusted positions by means of a setl screw 34, rlhisdevice is used as a gage,` being turned down into a horizontal position, when in use, and moved around-in a circle to determine the circumference of the inner wall of the silo, as indicated in broken .lines at A.v When not in use it can be turned upwardly against the center-pole, out of the way. l

In operation, .two sections of the centerpole are erected and provided with. staywires, as shown in Fig. 1, with said centerpole lperfectly plumb, and the foot thereof at a central point of the contemplated structure. In practice, the lower end of the pole. would rest upon the earth inthe bottom of an' excavation of some three or four feetiin depth. Before erecting theV lower section of the center-pole the sleeve 4 would be fattached thereto, and after the other sectionl is raised .and stayed the-arms 11 are putin position, and the braces 18 connected therewith, and with the hub 6. The platforml is.

then constructed, and vthe cross-bar and tackle connected with the upper section 1 by -means of a short ladder. f

The silo wall is carried upwarcill'yV as far as possible by workmen standing on the ground, and then the work is continued from the platform. When there is a course of blocks in line with the arms 11, and provided with the usual bond, the rods l2 are moved outwardly until the caps 13 are in Contact with said blocks, whereupon the caps are turned outwardly, holding the centerpole and scaffold from side movement, and preventing` the bending of said pole. `When the work has been carried a convenient distance beyond the platform, the caps are turned inwardly a suflicient distance to permit them to slide along the inner wall of the silo, the set-bolts 7 and 9 released, and the scaffold drawn upwardly a desired distance upon the center-pole. This is accomplished by a workman on the platform by means of the cable 25, and other workmen below, who make use of the rope 30.' For this purpose the upper end of the rope is connected with the sleeve el. For greater safety, before the set-bolts are released, the lower end of the rope 30 should be connected with a permanent object, and the lower end of the rope 25 should be attached to the frame-work of the scaffold.

When the scafi-old is raised until it occupies a position upon the upper section l, it is secured in place by the set-bolts in the sleeve and the caps 13 again caused to engage the wall of the silo. rlhe center-pole is then extended by adding another section thereto, and n properly staying the same,

after which the cross-arm 23 is fixed in place on such upper section.

After the silo is completed the above operation is reversed, and when at a point sufficiently near the ground, the braces 18 and arms 11 are disconnected, and the sleeve l removed from `the section l. The parts will thus readily pass through the opening` in a silo, and can be again put together for the next piece of work.

lt will be obvious that the rods 12 can be adjusted for a silo of any diameter. It will also be seen that the structure is simple, and of comparatively light construction.

`What l claim and desire to secure, is:

A device of the class described, comprising` a sectional center-pole; a sleeve slidable thereon and provided with means for attachment thereto; radial supporting arms detachably connected with said sleeve near the upper end thereof; telescopic sections 4at the outer ends of said arms, provided with wall-engaging means; braces uniting said arms and the lower end of said sleeve, and detachably connected with both thereof; a `circular member rotatably mounted on said center-pole above said sleeve; and a telescopic arm hingedly connected with said circular member, and capable of describing,` circle about said device, when said arm is in a horizontal position.

ln testimony whereof l afliX my signature.

JOHN MYERS., 

